Electric heater



Dec. 26, 1922. 1,440,171

A. PAP l NI ELECTRIC HEATER.

Famo APR. 2 1920- 4 SHEETS'SHEET 1 1 INVENTOR.

A TTORNEY.

Dec. 26, 1922.

INVENTOR.

A TTORNE Y.

Dec. 26, 1922. I 1,440,171

Elisi'l 'nrg l lgl'l 'zn.

FILED APR. 21 1920. 4 SHEETS'SHEET 4 iqa g" 102 2641 v INVENTOR.

ATTORNEY.

Patented Dec, 2 6, 1922.

PATENT OFFICE.

ANTONIO PAPINI, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRIC HEATER.

Application filed April 21,

To all whom; it may concern:

Be it known that I, ANTONIO PAPINI, a subject of the King of Italy, and a resident of Philadelphia in the county of Philadelphia and State of Pennsylvania, have invented an Improvement in Electric Heaters,

of which the following is a specification.

My invention relates to electric heaters and it has for its principal object to provide means whereby the heating element and reflector may be oscillated or rotated so as to more thoroughly cause radiation and distribution of heat in the room wherein the heater may be located.

A further general object of my invention is to provide means whereby the effects produced by an electric current may be employed to cause oscillatory actuation of the heating element or at least of the reflector associated therewith.

A further and more specific object of my invention is to provide means whereby the effect of the expansion and contraction of a thermostatic element may be employed to effect oscillatory movements of the heating element or at least of the reflector associated with the said element.

The construction in which the effects of the expansion and contraction of a thermostatic element are depended upon-or employed to efl'ectoscillation of the heating element and of the reflector associated there with or of either is employed when the supply of electric current is large and may be used freely. current is not so plentiful or where its use freely and unnecessarily, may prove too expensive, I prefer to employ a modified construction in which momentary magnetic effects at intervals of the current upon certain portions of the apparatus effect movements thereof to cause oscillatory movements of the heating element and its associated refiec'tor or either.

A further object of my invention isto combine in a single apparatus these two forms of construction, the arrangement andrelationship thereof and thewire arrangement being such that either form of struc- In cases, however, when the 1920. Serial No. 375,461.

of which follows or will be apparent from such description- In order that my invention may be readily understood and its practical advantages fully appreciated, reference should be had to the accompanying drawings in which I have illustrated a number of forms of embodiments thereof. However, it will be understood that the said invention is susceptible of embodiment in other forms of construction than those shown without departing therefrom or from the scope of the claims.

In the drawings:

Fig. 1 is a view showing diagrammatically the essential elements of one form of construction embodying my invention;

Fig. 2 is a view partly in vertical, longitudmal sectionand artly in elevation showmg a practical emit Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 2;

Fig. 4 is a View partly in vertical longitudmalsection and partly in elevation showmg a. modified construction of apparatus, the said construction comprising two means of operation, and the wiring and certain of the switch mechanism being shown diagrammatically;

Fig. 5 is atop plan view of Fig. 4 with the cover removed and the vertical shaft shown in Fig. 4 in section, the heating element and the connection and arrangement of the wiring therefor being shown diagrammatically Fig. 6 is a view partly in central vertical section andpartly in elevation of the upper portion of the structure shown in Fig. 4

Fig. 7 is a transverse sectional "view taken on the line 7-7 of Fig. 4;

odiment of the same;

Fig. 8 is a transverse, sectional view taken on the line 8-8 of Fig. 4;

Fig. 9 is a view in elevation of the switch device shown in Fig. 4;

Fig. 10 is a transverse, sectional view taken on the line 1010 of Fig. 9;

Fig. 11 is a viewin elevation of another switch device shown 'n Fig. ,4, the operation thereof being indicated; and

v ig. 12 is a perspective view ofa movable controlling element.

Referring first to Fig. "1 of the drawings 1 and 2 designate the line wires for conveying electric current. 3 designates a heating element which is situated inside and in front of the reflecting surface of the reflector 4:- 5 designates a conducting wire leading from the line wire 1 to the heating element 3 and 6 designates a conducting wire leading from the heating element. This wire is divided into two parts as indicated, one of which extends to a stationary contact member 7 and the other of which part extends to a stationary contact member, 8. 9 designates a sta tionary contact member which is connected by means of a conducting wire'1O to a binding post or screw 11. The latter is connected by means of a conducting wire 1.2 to the line wire 2. 13' designates a pivoted contact member which is adapted to co-operate with the stationary contacts 7, 8 and 9, as will hereinafter be pointed out. 15 designates a resistance thermostatic member consisting of a relatively long wire of suitable material which is secured at one end to the binding screw or post 11 and is then extended around a plurality of rotatable insulating wheels or pulleys 16, as indicated, and is connected at its opposite end to a ball-like or enlarged member 17 of conducting material upon one end of a bar or strip 18 to the opposite end of which a ball or enlargement of insulating.

material 19 is secured. A wire or cord 20 is secured to the ball or enlargement 19 and is coiled or wound a number of times around a shaft 21 supported in bearings formed in a bracket 22. The reflector 4: is secured to and supported upon the upper end of the shaft 21. .The outer end of the wire or cord 20 extending beyond the shaft 21 is connected to a coiled spring 23 the outer end of which is connected to a stationary post 24. When the pivoted switch member 13 is in the position shown in full lines it will be understood that the current flows from' the line Wire 1 through the conducting wire 5, the heating element 3, the conducting wire 6, to the stationary contact 7, through the contact member 13, thence to the strip or bar 18, along the current resisting thermostatic wire 15, to the conducting wire 12 and thence to the line wire 2. The passage of the currentthrough the resistance thermostatic wire 15 heats the' same thereby causing expansion thereof. Upon the expansion of the said wire the action of the spring 23, which is at all times under tension, upon the wire 20 pulls the same forward, causing rotation or oscillation of the shaft .21 in one direction and also causing movement of the strip or.bar 18 together with the enlargements 17 and 19 thereon and also causes forward movement of the resistance thermostatic wire 15 around the wheels or pulleys 16. As a result of such movement the enlargement 17 contacts with the lower end of the pivoted contact member 13 and efiects movement thereof into the dotted line position with the lower end thereof in contact with the stationary. contact device 8 and with the upper end thereof rent travels from the contact device 8 along the pivoted contact member 13 to the contact device 9, the conducting wires 10 and 12 to the wire line 2 without passing through, as is apparent, the resistance thermostatic wire 15. The latter is thus permitted to cool and in cooling contracts. In contracting or shortening it acts upon the strip or bar 18 to pull the same to the right, having reference to Fi 1, so as to turn the shaft 21 in the opposite direction and stretch and impose greater tension upon the spring 23. The movement of the bar 18 toward the right causes the ball or enlargement of insulating material 19 to cont-act with the lower end of the pivoted contact member 13 to effect pivotal movement thereof to disconnect the same from the stationary contact devices 8 and 9. -As a result of the latter pivotal movement of the contact member 13,-it is returned to the full line position shown in Fig. 1 so that the current is again caused to flow along the resistance thermo static wire 15 to heat the same and cause expansion thereof. The operation is repeated over and over indefinitely as long as the cur rent is permitted to flow through the heating coil 3 with the result that the heating 95 element and the reflector are oscillated as already indicated. The distance apart of the balls or enlargements 17 and 19 determines the frequency and extent or angularity of the oscillations of the shaft 21 and 100 the heating element and reflector carried thereby. It will be understood that any suitable switch device may be employed for shutting off the current from the line wires 1 and 2.

Referring now to Fig. 2 of the drawing in which, as already indicated, is shown one form of practical application of the invention as illustrated in Fig. 1 and as above described, 30 designates a hollow pedestal upon 110 the interior of which is situated the means for effecting oscillatory movements of the rotatable support of the heating element and the reflector associated therewith. 31 designates a spring connected at one end to 115 a stationaryv post or pin 32 secured upon the upper end portion of the hollow pedestal 13. The opposite end of the spring 31 is connected to a bar 33 provided with contact rollers 3t and 35 the former being situated v at the upper end of the said bar and the latter being adjustable to difl'erent positions thereon. The lower end of the bar 33 is rial, as for instance porcelain, and thence to a stationary insulated bindingpost or screw 44. 45 designates a conducting wire extending from the binding post 44 to a switch 46 of ordinary construction stationarily sup-- ported in any suitable manner within the pedestal 30. 47 designates a conducting wire extending from the said switch to the binding post 36'. The conducting wires 47 are connected with line wires and to the push button switch 46. The current which is brought into the switch 46 when the latter is in closed position flows along the wire 47, thence along the resistance thermostatic wire 15, the conducting wire 45 to the switch 46 and from the latter along one of the wires 47. The passage of the current through the resistance wire 15' heats the same and causes an expansion thereof. As a result of such expansion. the coiled wire 31 contracts and draws or pulls the bar 33 upwardly, causing the contact roller 35 to contact with the relatively short end portion 48 of a lever 49'pivoted at 50. The end portion 48 of said lever is thereby caused to move upwardly and simultaneously of course a downward movement of the opposite relatively long end portion 51 of the said lever drawings, the lower end of the is effected. By reason of the fact that the end portion 48 of the said lever is relatively short as compared with the end portion 51 thereof, movement of the former through a short distance effects movement of the other relatively lon end portion through a relatively great istance. The latter or relatively long end portion 51 of the lever is in engagement with contacting pins or lugs 53 upon a bar 54 slidably supported in bearings 55 upon the inner slde of the pedestal 30. The lower end of said bar is provided with an oblong portion 57 provided with a corresponding opening 58 within which the stationary push button switch 46 is situated. As the bar 54 is pushed downwardly by the downward movement of the end portion 51 of the lever 49, the upper end of the opening 58 comes into contact with the push button of the switch 46 and operates the sameto cut off the current from theconducting wire 47, the resistance thermostatic wire 15 and the conducting wire 45. The interruption of the flow of current along the resistance thermostatic wire 15 permits the same to cool. In cooling it contracts and in contracting it causes downward movement of the bar 33 to effect contact of the contact roller 34 with the upper side of the end portion 48 of the lever 49 to effect downward movement thereof, such movement carrying the lever 49 into the position in which it is shown as occupying in Fig. 2 of the drawings. In carrying or moving the bar 54 to its uppermost position as shown in Fig. 2 of the opening '58 is moved into contact with the push button end of the pedestal 30.

which rotation is caused at the lower end of the switch 46 to close the switch and permit current to again flow through the resistance thermostatic. wire 15. This operation is repeated over and over unless the current should be cutoff entirely from the switch 46.

In order that this operation may effect oscillatory movements of the support for the reflector and the heating element associated therewith, I have provided a cord or wire 60 which is connected at its lower end to the upper end of the bar 54, which cord or wire passes over a grooved roller 61 supported at the upper end of the pedestal 30. The upper end portion of the said wire extends around a grooved seat or pulley upon the lower end of a rotatable shaft 62 and is connected thereto. The lower end of the shaft 62 is provided with a reduced portion 63 which extends into an opening in'a bracket 64 situated near the upper end of'the pedestal '30. The shoulder upon the shaft 62 intermediate the reduced portion 63 and the said shaft rests upon the upper side of the bracket 64 as shown. The shaft 62 extends upwardly through a bearing 65 in the upper closed end portion of the pedestal 30 and also througha bearing 66 formed in a bushing or closing member 67 which closes the upper open end of an opening 68 formed in the upper end of the pedestal 30. The shaft is retained securely in its bearings by means of a screw bolt 70, the inner reduced end of which projects into an annular groove 71 formed in the shaft 62. The said screw bolt 00 70 is situated. in a screw opening 72 in one side of the upper end portion of the pedestal 30. The reflector 75 is supported upon bifurcated arms 76 which extend upwardly from the upper end of the said shaft. The heating element 77 is situated within the reflector 75 in the usual known manner and is connected by means of the wires 78 to the line wires 7 80 designates a coiled spring situated in the recess or opening 68 previously referred to. One end of the said spring is secured to the shaft 62 and the other end to the upper The spring is tensioned so as to tend to cause rotation of the shaft 62 in a direction opposite to that in by the contraction of the spring 31.

When the spring 31 contracts or shortens, which it does when current is permitted or caused to flow through the resistance thermostatic wire 15' to heat the same and cause expansion thereof, the lever 49 is actuated .to cause downward'movement of the bar 54 as already stated, such downward movement of the bar, by reason of the connection of its upper end with the lower end of thew-ire or cord .60 and of the upper end of the latter to the shaft 62, causes an oscillatory or rotary movement of the-latter toward the left; that is, in a counter-clockwise direction which increases the tension of the spring 80. Upon the interruption of the current through the resistance thermostatic wire 15' the latter cools and contracts and in contracting it draws or pulls the bar 33 downward, causing the contact roller 34 at the upper end thereof to contact with the end portion 48 of the lever 49 to move the same downwardly and cause upward movement of the end 51 thereof carrying the bar 54 upwardly and therebypermitting the tension of the spring 80 upon the shaft 62 to cause oscillatory movement thereof in the opposite direction; that is, in a clockwise direction. This operation is repeated over and over during the period that the current is allowed to flow at intervals through the resistance wire 15 as described. By adjusting the contact 35 to different positions upon the bar 33 so as to vary the distance between the said contact member and the contact member 34 the frequency and extent or angularity of the oscillations of the shaft 62 and of the heating element and reflector associated therewith may be likewise adjusted and varied.

Referring now to the remaining Figs, 4 to 12, of the drawings, in which the single construction shown combines the principle of operation disclosed and described in connection with Figs. 1 and 2, in which a relatively great quantity of electricity is consumed in the heating at intervals of the resistance thermostatic coils, and another form of construction in which a relatively small quantity of electricity is required; 90 designates an element of the frame or supporting structure upon which the operative parts of the structure are mounted and 91 desig nates a divided casing surrounding the lower portion of the said part 90 and upon which I the latter is supported.

I shall first describe the portion of the structure constituting my invention which is supported upon the upper portion or at the upper end of the supporting element 90. Upon the upper ends of arms 92 a plate 94 is secured upon which is supported a plate or disk of insulating material 95, both of which are provided with central openings 96 and 97 which are in registry.

The reflector 100 in this construction is supported upon the upper end of a shaft 101, the latter being rotatably supported upon the central portion of a cover 102 which is secured to the outer edge of the plate 94. The said shaft extends through an opening 103 in the said cover and is held in place thereon by means of collars 104 and 105, secured to the said shaft and situated upon the upper and lower sides respectively of the cover 102. The lower end portion of the shaft 101 projects through and is situated concentrically of the openings 96 and 97 through the plates 94 and 95. The lower end portion of said shaft adjacent and within the openm s 96 and 97 is enlarged as shown.

The said s aft is provided. with a toothed 0 wheel or gear 107 which is fixedly secured thereto and which is in engagement with a rotatable toothed wheel or gear 108, while the latter is in engagement with a rack segment 109 which is pivoted at 110 upon the insulating disk or plate 95. Sections of insulating material 109' are inserted in the arms 109" of the rack segment to prevent grounding of an electric current therethrough. The pivotally supported rack 109 is provided with a goose-neck shaped spring arm 111 on which is supported'a wheel 112 which is in contact with a segmental arcuate shaped member 113 which likewise is secured and supported upon the insulating disk 95. The said pivoted swinging segment 109 is also provided with a projection 114 to which is secured.

The sleeve 120 is situated in and extends through the openings 96 and 97 through the plate 94 and insulating disk 95 and surrounds and is in contact with the enlarged portion of the shaft 101 previously referred to. Notches 121 are provided upon the inner side of the lower end portion of the sleeve 120, which notches are situated in opposed relation to notches 122 upon the outer side of the lower end portion of the enlarged part of the shaft 101 already referred to. Unly two sets of these notches are shown but will be understood that any additional number may be employed. These opposing notches together form sockets. The upper end portion of the sleeve 120 is provided with an integral radial arm 125 which has a laterally extending, concentric slotted arm 126. The said arm 125 is provided with a wheel or. roller 127' upon its outer end which is adapted to contact with the curved inner surface of the member 128, and at intervals with the inclined surface or edge 129 upon the inner corner of a projection 129 at one end of a switch bar 130. The opposite end of the switch bar 130 is provided with a projection 129" which has a bevel or cam corner 129. The member 128 is secured to the insulating disk 95 by means of screws 131 while the switch bar 130 is pivotally supported upon a support 132, as shown in Fig. 5.

133 designates a ring which is rotatably supported upon the sleeve 120 directly underneath the arm 125. The said ring is provided with an arm 134 which is adapted to be adjustably connected with the arcuate shaped slotted arm 126 by means of a binding screw 135. The said arm 134 is provided with a contact wheel or rdller 136 which is adapted to contact with the inner arcuate surface of the member 128 and also at intervals with the projection 129.

The arms 125 and 134 are provided with sections of insulating material 137 to prevent grounding of an electric current therethrough.

The resistance thermostatic wire 15" extends around and is supported upon grooved rollers 140 and'141 of insulating material, said rollers being arranged in pairs, one above the other as shown in Fig. 6 of the drawings, and each pair of rollers being supported upon a screw bolt 142, the lower end of which is screw threaded into the insulating disk 95.

One end of the resistance thermostatic wire 15" is connected to a binding post-143 upon the insulating disk 95 and extends around the grooved rollers 141 and also around the rollers 140, as is clearly shown in Fig. 5. As already stated, the opposite end of the resistance thermostatic wire 15 is connected to the projection 114 upon the pivoted swinging segment 109. 144 designates a conducting wire connected at one end to the binding post 143 and at its other end beveled corner 129" of the to a binding post 144 by means of which a' contact clip 144" is secured to the insulating disk 95. The projection 129 upon the adjacent end of the switch bar 130 is adapted to be moved into and out of contact with the said clip.

145 designates a coiled spring secured at 146 to a stationary post upon the disk 95 of insulating material. The opposite end of the said coiled spring is connected to one end of a cord 147 which cord extends around a roller 148 mounted upon a post upon the insulating disk 95. The cord 147 is extended partially around a grooved wheel 150 which is connected and rotatable with the gear 108 previously referred to. The end of the said cord 147 is connected to the grooved wheel 150 at 151 as shown. 0

155 designates the heating element associated with the reflector 100, said element being connected with the binding posts 156 and 157 by means of the conducting wires 158 and 159. The conducting wires -160 and 161, leading from the line wires 162 are connected with binding posts 163 and 164, respectively, upon a movable contact control member 165. supported between the outer swinging bifurcated ends of a lever 166 pivoted at 167 upon one of the arms 92. The member 165 is provided with contacts 170 and 171 which extend therethrough, the opposite ends projecting upon opposite sides of the'said member as is clearly shown in Fig. 6 of the drawings.- In Fig. 6 of the drawings the upper ends of these contact members 170 and 171 are in contact respectively with the-contact clips 172 and 173 which are connected with the binding posts 156 and 157 respectively.

A clutch member 174 is slidably mounted upon a squared or polygonal portion 175 which projects from the lower end of the oscillatable shaft 101. Said clutch is provided with an annular groove 176 into which extend the inner ends of lugs 176 which project from the bifurcated side portions of the lever 166. The said clutch member is provided with projections which extend in opposite directions therefrom, the projections 177 upon the upper side thereof being adapted to enter the sockets formed by the opposing notches 121 and 122 when thelever 166 occupies the position shown in Fig. 6 of the drawings. WVhen in such position it will beapparent that the sleeve 96 is in locked or in clutched relation with respect to the shaft 101 and must rotate or oscillate therewith.

A wire 178 leads from the wire 158 to a binding post 180 by means of which it is connectedv to the arm 125, previously referred to, at a point beyond the sectionof insulation 187 therein. A second wire 179 leads from the conducting wire 159 to the member 113 and is connected thereto as indicated at 181; I

It may be noted at this point that the cover 102 is provided with relatively large openings 183 by means of which the interior of the cover is ventilated and the parts therein cooled.

Assuming that the parts are in the position shown in Fig. 6 of the drawings with the clutch fingers or projections 177 in engagement with the sockets formed by the notches 121 and 122 and with the contact fingers or members 170 and 171 in engagement respectively with the contact clips 172 and 173, the operation of the construction shown in Fig.4 of the drawings as thus far described is as follows:

The current passes along the conducting wire 178, the arm 125,- thence through the parts 128 and 130 to the clip 144", along the wire 144 to the binding post 143 and thence to the resistance thermostatic wire 15 and from the latterthrough the arm 111 to' the part 113 and thence to the wire 179 and along the latter to the wire 159, and ultimately to the line wire. The current in passing through the resistance thermostatic wire 15 heats the same, whereupon expansion takes place. Upon such expans on. the spring 145 contracts and draws the w re or cord 147 around the wheel 148 and effects rotation toward the right of the wheel 150 and gear 108 secured thereto. Such rotation causes pivotal movement of the segment 109 about its pivot 110 in a direction counter-clockwise, while at the same time rotation or oscillation in a like direction of the gear 107 and the shaft 101, to

tation of the shaft effects rotation or osthe spring 145.

the 'part 107 and of the shaft 101 causesacillation of the sleeve 120 and of the arms 125 and 134. Such'rotation continues until the contact roller 136 contacts with the cam surface 129" upon the corner of the projection 129" of the switch bar 130 to effect disengagement .of the projection 129 from the clip 144". Such disengagement or disconnection interrupts the current through the resistance thermostatic wire 15". Such wire thereupon cools and contracts or shortens, thus causing a reverse pivotal movement of the rack segment 109 and a consequent reverse rotary or oscillatory movement of the parts 150, 108, 107, and 101, such reverse movement of the part 150 acting through the Wire or cord 107 to stretch Such reverse movement of like reverse movement of the parts 125 and 134 so that the roller 136 is moved away from and releases the projection 129". As

' a result of such reverse movement the roller 127 again moves into contact with the surface 129 upon the inner corner of the projection 129 so as to return the switch bar 130 into the position in which-it is shown in Fig. 5 with the projection 129" in engagement or contact with the contact device 144". This operation is repeated over and overduring such period as current is permitted to fiow throu h the conducting wires 178 and 179. t will, of course, be understood that a switch may be interposed for-the purpose of opening and closing the circuit through these wires.

By relatively adjusting the arm 134' with respect to the arm 125, the distance apart of the rollers' 127 and 136 may be varied so as to vary' the frequency and the extent or angles of oscillation of the shaft 101 together with the parts carried upon and supported thereby.

The foregoing portion of the structure shown in Fig. 4 of the drawings is adapted and designed'for use in cases where power or current is plentiful. In cases, however,

i when the power or current is not so plentiful and it is desired to conserve the same, the construction indicated in the lower part of Fig. 4' should be employed.

When it is desired to employ this construction, the lever 166 is moved into the position shown in Fig. 4 of the drawings in which the clutch member 174 is moved downwardly upon the reduced squared portion 175- projecting downwardly from the shaft 101 so that the clutch projections 177 are out of engagement with the sockets formed by" the notches 121 and 122 and with the clutch projections or fingers 190 in engagement with sockets 191-in the enlarged upper end of a short shaft 192 journaled in an opening 193 in the upper end portion of the supporting element 90. The lower end of the said shaft is reduced as indicated portion 194 are guided by means of a set 7 screw 203 which projects into a groove 1n the side and extends longitudinally of the said reduced portion 194. The opening in the lower end of the tubular member 200 is enlarged for the reception of an elastic. button of rubber or other suitable material 205.

210 designates a coiled spring, the upper end of which is seated against an annular abutment 211 supported upon the supporting element 90. said spring is situated adjacent the elastic button 205. The lower end of the spring is seated upon the upper side of a head The upper end of the portion 212 formed upon the upper end of f an extension 218 which projects from a part i 214 constituting the core of a solenoid 215.

The lower end of the spring'210 surrounds a hollow boss or projection216 upon the upper side of the head 212. This hollow boss is closed by means of a cap 217 in screw threaded engagement with screw. threads upon the interior of the said boss.

The head 212 is provided with a transverse opening 219 extending therethrough in which is seated a slidable member 220 which operates to actuate certain parts of the construction as will be hereinafter pointed out.

The upper edge of the member 220 is provided with a couple of notches or recesses 221 and 222 separated by a wedge-shaped projection as shown.

223 designates a spring pressed plunger which projects through an opening from the hollow boss 216 into the transverse opening 219. Said plunger is held in depressed position by means of a spring 224. It will be apparent that the sliding member 220 may be moved in opposite directions within the transverse opening 219. The purpose of such movement will. be hereinafter explained.

The core 214 is adapted to be moved upwardly from the position shown in Fig. 4 by the action thereon of the solenoid 215 when the latter is energized. Such upward move-.

ment takes place quickly and as it moves upwardly one or the other of the two cam.

234 which project from the supporting frame or member 90. The members 232 are adapted to alternately travel upwardly and downwardly as and for the purpose to be hereinafter described. Each of the members 232 is provided with a transverse horizontal opening- 235 in which is situated a plunger 236 which is pressed inwardly by means of a spring 237 so that the ends thereof normally occupy positions below but to one side of the inclined cam surfaces 231. The inner end of each of these members 236 is beveled or inclined upwardly as shown. As illustrated, the part 214; that is, the core of the solenoid, is in substantially its lowermost position with the member 220 occupying its extreme left hand position, having reference to Fig. 4 of the drawings, with its end portion overlying the upper inner end portion of the left hand plunger 236.

Assuming now that the solenoid 215 is momentarily energized, the core 214 will be caused thereby to move quickly upwardly.

The inclined cam surface 230 at the left hand end of the member 220 will contact with the adjacent inclined cam surface 231 upon the inner side or edge of the left hand member-230, in consequence of which the member 220 is pushed to the right so that the plunger 223 will be moved into or will be caused to occupy the notch or recess 221.

As the core 214 continues its upward movement the right hand inclined cam surface 230 of the member 220' will contact with the upwardly inclined cam surface upon the'inner end of the right hand plunger 236. The springs 237, which normally hold the plungers 236 in their innermost positions, are of a strength such that when a cam surface 230 upon either end of the member 220 contacts with the cam surface upon the inner end of a plunger 236, the latter is pushed outwardly so that the projecting end of saidmember 220 may pass beyond the said plunger into position above the same. The

movement of the core 214 into its uppermost the tendency of the spring 210 to expand and return to its normal position as shown in Fig. 4 causes downward movement of the core 214 together with the parts associated with and controlled thereby. At such time, however, the right hand end portion of the slidable member 220 occupies a position above the left hand end of the right hand plunger 236 consequently downward movement of the member 214, and of the slidable member 220, causes downward movement of the right band member 232 into-the position at present occupied by the left hand member 232. The positions of the two parts 232 are reversed due to the fact that a cord 7 connection between the said shaft and the shaft 101 like oscillations of the shaft 101 are effected.

In order to control the downward movements of the core 214 under the influence of the spring 210, I have provided said core 214 at a piston 250 which is situated in a cylinder 251 supported upon brackets 252 secured inside of the lower end portion of the casing 91. This piston head is provided with openings 253 which are adapted to be opened and closed by means of valves 254 which are normally held in place by means of a spring 255 secured to the lower end of the member 214 by means of a headed screw 256.

Thecylinder 251 is provided with openings 259 through which air has free access to the upper portion thereof. The cylinder is provided in its lower closed end with a vent opening 260 through which air is adapted to escape from underneath the piston 250 as the latter descends under the infiuence of the spring 210. In order to control the rapidity of descent of the piston 250 and of the core and the parts associated, operated and controlled thereby, I have provided a valve 262 by means of which the passage of air through the opening 260 may be controlled; By a proper adjustment of this valve the valve opening 260 may be more or less nearly closed to control the rate or rapidity of discharge of air from the portion of the cylinder 251 underneath thepiston 250. As the piston 250 is drawn upwardly when the core 214 is actuated upwardly, a partial vacuum is created in the cylinder underneath the piston 250, with the result that the normal air pressure acting upon the valves 254 opens the same and allows air to flow through the passageways 253 into the cylinder.. Immediately, however, upon the cessation or upward movement of the piston 250 the valves are closed, and the solenoid having become de-energized, the core 214 and the piston 215 begin their descending movement, the rate of which depends upon the rate at which the air is permitted to escape through the passageway 260.

In Fig. 4 of the drawings the lever 166 has its lower end with' been moved from the position shown in and 288 and 287 may Fig. 6 so that the lower ends of the contact membersor bars 170 and 171 are in engagement with the contact clips 270 and 271. 272 and 273rdesignate binding screws theinner ends of which are in contact with the clips 270 and 271 respectively. From the bind ing screw 272 a conducting wire 275 extends to the heating element 155. From the latter a conducting wire 276 extends forward to a clip 277 formin part of a two-way switch construction. 2 8 designates a clip of 'the said switch construction from which a conducting wire 279 extends to an oscillatable switch bar 280 pivoted at one end as indicated at 281. The inner swinging end of the said switch bar is adapted to contact with the stationary contact clips 282 and 283. From the latter a conducting wire 284 extends to the solenoid 215, A conducting wire-286 leads from the latter and is con nected to a clip 287 forming a part of the two-way switch construction previously referred to. From a clip 288 also forming a part of the said two-way switch construction a conducting wire 289 leads and is connected at its opposite end to the binding screw 273. 290 designates a rotatable bar of insulating material rotatably supported cen. trally with respect to the four contact clips 277, 278, 287 and 288, upon a base or support 291. The bar 290 is rotated by means of a finger piece or handle 292. 293 and 294 respectively designate contact members by means of which the contact clips 277 and 278 be electrically connected, as indicated in Fig. 4 of the drawings. By turning 292 and the insulating member 290 connected therewith to the left or right the connecting member 293 or 294 may be moved into contact with the contact clips 277 and 288. Thesaid parts are indicated in such position in dotted lines in Fig. 4 of the drawings.

A conducting wire 298 connects the wire 286 with the clip 282.

For the purpose of eifecting or causing shifting or switching movement of the piv-' oted switch bar 280, I have, provided a tripping device 300 which is secured near the upper end of the extension 213 of the'c'ore 214. The tripping device 300 is in the form of a bracket which projects-laterally from the extension 213. At itsouter end the said device is widened as indicated and is pro vided at its upper edge with a prong or projection 301 and at its lower edge with a like projection 302, the former being substantially longer than the latter, as shown. The projection 302 is of a'length such that when it is moved upwardly upon the upward movement of the core 214 it will strike the lower edge of the inner end portion of the in Fig. 4 of the drawings, and cause upward movement thereof. As the said switch bar moves upwardly, however, the inner end thereof passes or recedes to a position such that the inner end of the projection 302 will pass beyond the same. When the core 214 is moved downwardly, however, carrying with it the tripping device 300, the longer projection 301 is of suificient length that it will contact with the upper edge of the inner end portion of the switch bar 280 when it is in its uppermost or elevated position in contact with the switch 280 and cause movement thereof in the opposite or downward direction. A

For the purpose of causing quick movements of the switch bar in either direction after it has passed beyond the central horizontal position with respect to its pivot 280, I have provided a spring 304.. As soon as the switch bar has passed to a point either above or below such central horizontal line; the line between the points of connection of the spring 304 and the bar 280 and the casing 91 or other stationary support is moved to positions above or below the center of the pivot 281. Immediately upon this occurrence the bar 280 is snapped or moved quickly in an upwardly or downwardly di-' rection to parry the inner end portion thereof into "contact either with the upper clip 282 or with the lower clip 283. The operation of the device is clearly indicated in Fig. 11 of the drawings. Assuming the parts to be in the position shown in Fig. 4 of the drawings, the current will pass through the wire 275 to the heating element 155, forwardly therefrom along the wire 276 to the clip'277, from the latter upon the connecting switch member 293 to the clip 27 8, along the wire 279 to the switch .bar 280, from the clip 283 over the wire 284 The projection 302 contacts with the under "edge of the outer end portion of the switch bar 280 and causes movement upwardly thereof into contact with the contact clip 282. During the time that the switch bar 280 is in contact with the clip 282 the current passes or flows from the switch bar 280 through the wire 294 andthence back to the clip 271. As already described, during this period, while the switch bar 280 is in contact with the contact clip 282, the core 214 is gradually moved downwardly under the influence of the spring 210. As a result of such downward movement the projection 301 contacts with the upper edge of the inner end portion of the bar 280 and causes downward movement thereof into contact with the clip 288, as shown in full lines in Fig. 4 and in dotted lines in Fig. 11 of the drawings. Upon this occurrence the current is again directed through the solenoid 215 to'energize the same and again cause ret urn upward movement of the core 214. The operation is repeated over and over during the period that the switch members 293 and 294 are allowed to remain in the positions shown in Fig. 4 of the drawings. If it is desired to discontinue the oscillatorymovements of the heating element and the reflector associated therewith, this may be accomplished by turning the member 290 so as to cause one or the other of the switch connecting contacts 293 or 294 to contact with and extend between the contact members ,277 and 288. When in the latter position the current passes directly acrossfrom the lower end of the conducting wire 276 to the wire 289 and thence directly back to the clip 271.

It will be noted that in Fig. 1 of the drawings the heating element is arranged in series with the resistance thermostatic element 15 while in Fig. 5 the heating element 155 is arranged in parallel with the resistance element 15. Either arrangement may be employed as may be preferred or desired.

The resistance thermostatic elements 15, 15 and 15" constitute supplemental heating elements, radiating a certain amount of heat in addition to and supplementing that radi ated by the heating element.

It will be understood that switches may be placed in any line and at any convenient point for the purpose of controlling the circuit, either opening it or closing it, thereby preventing or permitting current to flow through the circuit as may be desired.

It will be seen that I have provided a simple construction by the employment of which the heating element of an electric heater may be oscillated for the purpose and object as hereinbefore set forth. It will also be seen that by my invention as embodied in the construction illustrated in Fig. 4 I have provided an apparatus which may be operated in either of two ways and that either way may be employed depending upon the circumstances of any particular occasion or requirement.

I claim:

1. In an electric heater, the combination of a heating element, a reflector associated therewith, and an electric circuit comprising an element therein adapted to expand upon the passage of a current therethrough, the said element being adapted to cause oscillatory movements of the said heating element and reflector.

2. In an electric heater, the combination of a heating element, a reflector associated therewith, and means for causing oscillatory movements of the said element and re- Hector.

3. In an electric heater, the combination of a heating element and an electric circuit comprising an element therein adapted to expand upon the passage of a current therethrough, the said element being adapted to cause oscillatory movements of said heating element.

4. In an electric heater, the combination of a heating element, a circuit comprising an element adapted to expand upon the passage ofa current therethrough, and means for interrupting the current through said circuit to permit the said expansible element to contract, and means interposed between the said last mentioned element and the said heating element whereby the expansion and contraction of the former causes oscillatory movements of the latter.

5. In an electric heater, the combination of an electric heating element, an electric circuit comprising a resistance thermostatic element and means interposed between said thermostatic element and the said heating element whereby oscillatory movements are effected as the result of passage of electric current through said thermostatic element.

6. In an electric heater, the combination of an electric heating element,'a reflector associated therewith, an electric circuit comprising a thermostatic element, means for interrupting the passage of current through said element and means interposed between the said thermostatic element and the said electric heating element and reflector whereby oscillations thereof are effected by the said thermostatic element.

7. In an electric heater, the combination of an electric heating element, an electric circuit comprising a resistance thermostatic element, means actuated by the expansion of said thermostatic element to interrupt the current therethrough whereby the said thermostatic element is permitted to cool and to contract, the contraction thereof automatically closing the circuit therethrough to again cause expansion thereof, and means interposed between the said thermostatlc element and the said electric heating element to cause oscillatory movements thereof.

8. In an electric heater, the combination of an electric heating element, a reflector associated therewith, an electric circuit com prising a resistance thermostatic element, means actuated by the expansion of said thermostatic element to interrupt the current therethrough whereby the said thermostatic element is permitted to cool and to contract. the contraction thereof automatically closing the circuit therethrough to again cause expansion thereof. and means interposed between the said thermostatic element and the said electric heating element and the reflector to cause oscillatory movements thereof.

9. In an electric heater, the combination of an electric. heating element, a reflector associated therewith, a circuitcomprising a relatively long section of resistance wire which upon the passage ofcurrent there- .through heats and expands, means controlled by said expansion for interrupting the said current to permit the said wire to cool and contract, the said 'means being moved as aresult of suchcontraction intoposition to again complete the circuit through said resistance wire, and means intermediate the said resistance wire and the said electric heating element and reflector associated therewith for causing oscillatory movements of said heating element and reflector.

10. In an electric heater, the combination I of an electric heating element and 'a reflector associatedtherewith, a revoluble shaft for supporting said reflector and heating element, a circuit comprising a resistance thermostatic wire which is adapted to become heated and to expand upon the passage of current therethrough, a switch -actuated as a result of such expansion to interrupt the current through said member to permit the same to coolv and to contract,

means whereby the contraction of said mem- '11. In an electric heater, the combination of a heating element, a reflector associated therewith and electric thermostatic means I adapted to cause oscillatory movements of the said element and reflector.

12. In an electric heater, the combination of an electric heating, element, a reflector associated therewith, electrical means for causing oscillatory'movements of the said.

element'and the ,said reflector, and means for regulating and controlling the amplitude of said oscillations. 13. In an electric heater, the combination of a heating element, an-electric circuit comprising a member which is adapted to become heated and to expand upon the passage-ofpurrerit therethrough, means for interrupting the passage of 'current through/ said member whereby it 'is-pei'mitted to cool i i and to contract, and means actuated by said member' for effecting oscillatory movements ofthe said heating element, said means comprismg an adpastable device which is adaptand to expand upon the passage of current therethrough, means 'for interrupting the passage of current through said member whereby it is permitted to cool and to contract, and means actuated by said member for effecting. oscillatory movements of the said heating element and the reflector asso ciated therewith, said means'comprising an adjustable device which is adapted to be adjusted for con-trolling and varying the extent of the said oscillatoiymo-vements.

15. In an electric heater, the combination of a heating element, an electric circuit comprising a resistance thermostatic member, said circuit comprising a switch, means actuated by the said resistance member for opening and closing the said switch to interrupt the current through thesaid member, and means operatively connecting the.last mentioned means and the said heating element for effecting oscillatory movements of the latter.

16. In an electric heater, the combination of a heating element, a circuit comprising a relatively long 1 resistance wire which is adapted to become heated upon the passage of current therethrough and to expand such passage, 'a switch comprised in said circuit, a tension member acting upon said resistance wire todraw the same in one direction, a lever pivoted intermediate its ends, means interposed between the saidresistance wire and the said tension member for contacting with one end of said lever to actuate the same, a switch control bar actuated by other end of said lever for opening and closing the said switch, and means interposed between the said switch control bar and the said heating element whereby movements of said bar cause oscillatory movements of the said heatin element.

17. In an electric heater, the combination of a heating element, an electric circuit comprising a resistance wire extending around and supported upon a plurality of spaced supports, the said wire being-adapted to become heated upon the passage of current therethrough and to expand, a tension member having operative connection at one end with one end of said wire and which is connected at its opposite end to a fixed support, the said tension member tending to draw the said wire about its supports, a switch de vice interposed in said circuit, a switch control bar for controlling! said switch, a lever pivoted intermediate its ends, 'meansoperated 1n one direction upon the passage of current through said resistance wire to actuand controlling the extent of the oscillatory ate the said switch control bar in one direction to open said switch, and actuated in the opposite direction upon the interruption of said current to move said bar in'the opposite direction to close the said switch, and means actuated by the movements of said switch control bar to cause oscillatory movements of the said heating element.

18. In an electric heater, the combination of a heating element, an electric circuit including said heating element, a resistance thermostatic member adapted to be placed in series with the said heating element, means for alternately opening and closing the circuit comprising the said element without interrupting the passage of current through said heating element, and means controlled by said member for causing oscillatory movements of the said heating element.

19. In an electric heater, the combination of a. heating element, a reflector therefor, an oscillatable support for said reflector and heating element, a resistance thermostatic element adapted to be placed in series with said heating element, means for opening and closing the said circuit through the said member Without interrupting the current through the said heating element, and means actuated by the said member alternately in opposite directions for causing oscillatory movements of the said oscillatable support.

20. In an electric heater, the combination of a heating element, a reflector therefor, an oscillatable support for said reflector and heating element, a resistance thermo-.

static member adapted to be placed in series with the said heating element, means for opening and closing the circuit through said member, means adapted to be actuated in opposite directions by the said member for causingoscillatory movements of said oscillatable support, and means for varying movements of said support.

21. In an electric heater, the combination of a heating element, a resistance thermostatic member in parallel with said heating element, means adapted to be operated at intervals for interrupting the current through said member to effect heating and cooling of the said member, thereby effecting expansion and contractlon of the same,

' means controlled and actuated by the expansion and contraction of said member for causing oscillatory movements of the said heating element.

'22. In an electric heater, the combination of a heatingelement, a circuit comp-rising a resistance thermostatic element which is adapted to be heated upon the passage of current therethrough. means operating at intervals for interrupting the through said member, the said member expanding upon the passage of current therethrough and contracting upon the interrupcurrent tion of the current, and means actuated by the expansion and contraction of said member for causing oscillatory movements of the said heating element.

23. In an electric heater, the combination of an electric heating element and a. reflector therefor, a revoluble support for the said reflector and element, a circuit comprising a resistance thermostatic member which is adapted to expand upon the passage of current therethrough, means for interrupting the said current-at intervals during which the said member contracts, a controlling device actuated and controlled by the expansion and contraction of said member, and means operatively connecting said device and the said revolubl'e support for causing oscillatory movements of the latter.

24. In an electricheater, the combination of a heating element, independent means for causing oscillatory movements thereof, and means whereby either of said means may be operated for effecting said oscillatory movements.

25. In an electric heater, the combination of a heating element, a revoluble support therefor, independent means for effecting oscillatory movements of said support and said element, and means whereby either of said means may be placed in operative relation to said support to cause oscillatory movements thereof.

26. In an electric beaten, the combination of a heating element and a reflector therefor, an oscillatable support for the said element and reflector, independent means for effecting oscillatory movements of said support, and shiftable means whereby either of said means may be placed in operative relation to said support for causing oscillatory movements thereof.

27. In an electric heater, the combination of a heating element and a reflector therefor, an oscillatable support for the said element and reflector, independent means for effecting-oscillatory movements of said support, and manually shiftable means whereby either of said means may be placedin operative relation to said support for causing oscillatory movements thereof.

28. In an electric heater, the combination of a heating element and a reflector therefor,

an oscillatable support for said element and reflector, independent means for effecting oscillatory movements of said support, and a manually operable device interposed be- .tween said means whereby either may be static member in parallel with the said heating element, means interposed between said member and said oscillatable support for causing oscillatory movements .thereof, and the other of said means comprising a circuit including the said heating element and which is adapted to include an electro-magnet' in series, means for interrupting the passage of current through said electr0-magnet without interrupting the passage of current member in parallel therewith whichis adapted to expand upon the passage of current therethrough, means, for interrupting the passage of current through the said member topermit the same to cool and contract,

means actuated by the expansion and contraction of said member for causing oscillatory movements of the said heating element, the other of said independent means comprising a circuit including the heating element, means for including an electro-magnet in said circuit without interrupting the passage of current through the said heating element, a core for said electro-magnet, said .core being adapted to be moved in one direction upon the passage of current through said electro-magnet, means for causing re-' verse movement of said core, and means adapted to be actuated by the said core upon the reverse'movements thereof to cause oscillatory movements of the said heating element, and manually operable means for placing either of the said independent means into operative relation with the said heating element to cause oscillatory movements thereof.

31. In an electric heater, the combination of a heating element, arrevolub-le support therefor, mechanism: for causing oscillatory;

movements of said support, and electric means operating at intervals for controlling the said mechanism."

32; In an electric heater, the combination of a heating element, an oscillatable support therefor, means acting alternately in opposite directionsupon said support to cause oscillatory movements thereof, an electricallycontrolled means operating at intervals upon the said first named means for actuating the latter first in one direction and then in the other.

33. In an electric heater, the combination of a heating element, an oscillatable support therefor, and means acting alternately in opposite directions thereon for causing oscillatory movements thereof.

34. In an electric heater, the combination of a heating element, an oscillatable support therefor, and electrically controlled means operating at intervals in opposite directlons be moved longitudinally in one direction upon the energizing thereof, means actuated by said core for interrupting the current through the said magnet upon movement of said core under the influence of said magnet, means acting upon said core for causing return movement thereof in the opposite direction, and means adapted to be engaged upon alternate return movements of said core for causing alternate movements of said oscillatable support in opposite directions.

37. In an electric heater, the combination of a heating element, an oscillatable support therefor, a circuit including an electromagnet, a core. for said magnet adapted to be moved longitudinally in one direction upon the energizing thereof, means actuated by said core' for interrupting the current through the said magnet upon movement of saidcore under the influence of said magnet, means acting upon said core for causing return movement thereof in the opposite direction, means adapted to be engaged upon alternate return movements of said core for causing alternate movements of said oscillatable support in opposite directions,"

and means for controlling the speed of return movements of said core to thereby control thespeed of the oscillatory movements of the said support.

38. In an electric heater, the combination of a heating element, an oscillatable support therefor, a circuit comprising an electromagnet, a core for the said magnet which is adapted to be moved in one direction upon the energizing of the said magnet, one end of said core projecting into a-cylinder and being provided with a piston fitting the interior of'said cylinder, yielding means for causing return movements of said core, means for controlling the speed of return movement of said core, a pair of actuating devices having connection with said oscillatable support, and' meanscarried by the -magnet, a core for said magnet adapted to said core for alternately engaging the said device upon the return movement of said core to cause movements of said devices alternately in opposite directions to thereby cause oscillatory movements of said oscillatable support.

39. In a heater, the combination of a heating element, a pair of actuatingdevices, means for causing alternate movements of said devices in opposite directions, and connections between the said devices and the said heating element whereby oscillatory movements of the latter are effected by the movements of said actuating devices.

40. In a heater, the combination of a heating element, a pair of movable actuating devices, means for causing movements of said devices in opposite directions, connections between said devices and said heating element whereby movements thereof cause 0scillatory movements of said heating element, and means for controlling the extent of angularity of the said oscillations.

41. In a heater, the combination of a heating element, means for causing oscillatory movements of said element, means for controlling the extent of angularity of said movements, and means for regulating the speed of said movements.

42. In a heater, the combination of a heating element, a plurality of actuating devices, means for causing movements of said devices alternately in opposite-directions, connections between the said devices and the said heating element whereby alternate movements thereof cause oscillatory movements of the said heating element, means for controlling the extent of angularity of said movements, and means for controlling the speed of said movements.

43. In aheater, the combination of a heating element, a plurality of actuating devices, a reciprocating member, relatively movable means carried by said member for alternately engaging said devices and remaining in engagement therewith during the movements thereof in one direction to cause movements of the said actuating devices, connections between said devices and the said heating element whereby movements of said de vices cause oscillatory movements of said heating element, means for limiting the ex-' tent of the reciprocating movements of the said reciprocating member to control the extent of angular movement of said heating element, and means for controlling the speed of movement of said reciprocating member in one direction to thereby control the speed of oscillatory movement of the said heating element.

44:. In a heater, the combination of a heat ing element, a plurality of actuating devices arranged in parallel relation with respect to each other, a reciprocating member, a catch device supported upon and adapted to slide transversely of the said reciprocating member, movement of the said catch device being effected by contact of one end thereof with one of the said actuating devices upon movement of the said reciprocating member in one direction, the opposite end of the said catch device being adapted to engage a spring pressed plunger upon the other of said actuating devices, the said actuating device the plunger'of which isengaged by the said catch device being carried forward as the said reciprocating member moves in the opposite direction,connections between said actuating devices and the said heating element whereby movements of the said actuating devices alternately in opposite directions cause oscillatory movements of the said heating element.

45. In a heater, the combination of a heating element, a plurality of actuating devices arranged in parallel relation with respect to each other, a reciprocating member, a catch device supported upon and adapted to slide transversely of the said reciprocating member, movement of the said catch device being effected by contact of one end thereof with one of the said actuating devices upon movement of the said reciprocating member in one direction, the opposite end of the said catch device, being adapted to engage a spring pressed plunger upon the other of said actuating devices, thesaid actuating device the plunger of which is engaged by the said catch device being carried forward as the said reciprocating member moves in the opposite direction, connections between said actuating devices and the said heating element whereby movements of the said actuating devices alternately in opposite directions cause oscillatory movements of the said heating element, and means for regulating and controlling the extent of said oscillatory movements.

46. In a heater. the combination of a heating element, a plurality of actuating devices arranged in parallel relation with respect to each other, a reciprocating member, a catch, device supported upon and adapted to slide transversely of the said reciprocating member, movement of the said catch device being effected by contact of one end thereof with one of the said actuating devices upon movement of the said reciprocating member in one direction, the opposite end of the said catch device being adapted to engage a spring pressed plunger upon the other of said actuating devices, the said actuating device the plunger of which is engaged by the said catch device being carried forward as the said reciprocating member moves in the opposite direction, connections between said actuating devices and the said heating element whereby movements of the said actuating devices alternately in opposite directions cause oscillatory movements of the of a heating element, an electro-magnet,

said heating element, means for regulating and controlling the extent of said oscillatory movements, and means for controlling the speed of travel of said oscillatory movements.

47. In anelectric heater, the combination means for throwing said magnet into and out of the said circuit including the heating element Withoutinterrupting the passage of current through the said heating element, a core adaptedto be moved in one direction upon the energizing of said electro-magnet, a coiled spring interposed between a stationary abutment and the inner end of said core, said spring operating to cause movement of said core in the opposite direction, means for regulating the speed of return movement of said core, a plurality of actuating devices, a catch device upon said core, means for causing movements first in one direction and then in the other of the said catch device,

means carried by said actuating devices and adapted to be alternately engaged by 'the said catch device upon the completion of the movement of said core occasioned by the energizing of the said magnet,-connections between the said actuating devices and the said heating element whereby the successive return movements of the said core cause alternate movements in opposite directions of the said actuating devices to effect oscillatory movements of the said heating element.

48. In an electric heater, the combination of a heating element, an electro-magnet, means for interrupting the current therethrough without interrupting the passage of the current through said heating element, a core for said magnet adapted to be moved longitudinally upon the energizing thereof, a-cylinder situated in approximate relation to the said magnet, a piston secured to one end of said'core and operating in said cylinder, means for controlling the speed of travel of the said piston in one direction in said cylinder, and means intermediate said core and the said heating element whereby the re ciprocating movements of the former efiect oscillatory movements of the latter.

49. In an electric heater, the combination of a heating element, an electro-magnet, a

core therefor adapted to be moved in one direction upon the energizing of said magnet,

50. In an electric heater, the combination.

of a heating element, an electro-magnet adapted to be connected in series With the said heating element, a core adapted to be moved quickly in one direction upon the energizing of said magnet, means for automatically cutting the said electro-magnet out of the said circuit upon such movement of said core, the said means acting automatically to close the circuit through the said magnet upon the return of the said core upon the d-eenergizing of said magnet, means for causingthe return of said core upon the deenergizing of the magnet, means for controlling the speed of travel of the return movement thereof, and actuating devices situated in spaced, substantially parallel relation with respect, to each other on opposite sides of the inner end portion of said core, the said core having a part adapted to alternately engage the said actuating devices upon the return movements of'said core to effect alternate movements of the said actuating devices in opposite directions, and connections between the said actuating devices and the said heating element whereby movements of the said devices cause oscillatory movements of the said heating element.

In testimony that I claim the foregoing as my invention I have hereunto signed my name this 19th day of April, A. D. 1920.

ANTONIO PAPINI. 

